VANCOUVER, British Columbia, Aug. 03, 2021 (GLOBE NEWSWIRE) -- Mr. Robert Rosenblat, President of Mayne Minerals Inc, a private Vancouver based mining company reports that the company has acquired an option on a large land package designated as the Hart prospect, in Northern British Columbia, Canada. The Hart property is a frontier project containing multiple occurrences of both Light and Heavy rare earth elements (REEs) together with a significant amount of rare metals (RM). This project covers an area of more than 5000 hectares. A reconnaissance grass roots sampling program in 2010, conduct...